Bill R.
10-31-2014, 02:51 PM
Had a new customer just moved out from Texas, a 79k mile odyssey touring with cylinder management (shuts off 3 cylinders while cruising no load) Had just been serviced at the dealer before coming out here, Customer had noticed a ticking sound for a long time and thought it was normal.
Out here a month or so later, check engine light starts flashing and message on the dash pops up. I tell them not to drive it and go look at it, scan it and its cylinder #5 misfire. I think no problem, its a bad coil or sparkplug,order a coil
and plug, Bearing in mind that this is a 79k mile van and the first plug change is due at 105k miles, so theses have never been touched.
Come back later to replace the coil and plug and cant get the coil out of the spark plug tube, its melted/fused in.3 hours later i get the last of the melted coil out and the spark plug comes out with it, all the threads are melted off and the outside electrode is gone on the plug, Threads in the head are gone and the hole is oval. Turns out that #3 plug is backing out on some ody,pilots and accords, this is the middle plug in front closest to the radiator. I put a camera down in the spark plug hole and didn't see any damage to the piston, valves or cylinder wall.
There wasn't enough material in the head to tap it out for a helicoil, turns out that a time sert was big enough to use,ordered the time sert spark plug kit ,tapped it cleaned it,installed it,put the new coil in and plug and it was fine.
Honda isn't acknowledging this as a problem yet but a few people are getting it fixed under good will.. most aren't and its typically 3200 to $5000 from honda, they say head must be replaced and in some cases a used motor is installed. Just a heads up for any of you that own a 2006 and newer v6 honda, check the spark plug to make sure its tight on the #3 cylinder. It backs out until the coil won't let it move and further and then each time it ignites some of the mixture burns back up , melts everything.
Out here a month or so later, check engine light starts flashing and message on the dash pops up. I tell them not to drive it and go look at it, scan it and its cylinder #5 misfire. I think no problem, its a bad coil or sparkplug,order a coil
and plug, Bearing in mind that this is a 79k mile van and the first plug change is due at 105k miles, so theses have never been touched.
Come back later to replace the coil and plug and cant get the coil out of the spark plug tube, its melted/fused in.3 hours later i get the last of the melted coil out and the spark plug comes out with it, all the threads are melted off and the outside electrode is gone on the plug, Threads in the head are gone and the hole is oval. Turns out that #3 plug is backing out on some ody,pilots and accords, this is the middle plug in front closest to the radiator. I put a camera down in the spark plug hole and didn't see any damage to the piston, valves or cylinder wall.
There wasn't enough material in the head to tap it out for a helicoil, turns out that a time sert was big enough to use,ordered the time sert spark plug kit ,tapped it cleaned it,installed it,put the new coil in and plug and it was fine.
Honda isn't acknowledging this as a problem yet but a few people are getting it fixed under good will.. most aren't and its typically 3200 to $5000 from honda, they say head must be replaced and in some cases a used motor is installed. Just a heads up for any of you that own a 2006 and newer v6 honda, check the spark plug to make sure its tight on the #3 cylinder. It backs out until the coil won't let it move and further and then each time it ignites some of the mixture burns back up , melts everything.